CN111849580A - BOG and oil gas combined recovery system and process method - Google Patents
BOG and oil gas combined recovery system and process method Download PDFInfo
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- CN111849580A CN111849580A CN202010694473.1A CN202010694473A CN111849580A CN 111849580 A CN111849580 A CN 111849580A CN 202010694473 A CN202010694473 A CN 202010694473A CN 111849580 A CN111849580 A CN 111849580A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/12—Liquefied petroleum gas
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- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a BOG and oil gas combined recovery system and a process method, which comprises the following steps: the cold storage type heat exchanger comprises a fuel gas pump, a first valve, a second valve, a third valve, a fourth valve, an oil gas pump and a cold storage type heat exchanger; BOG that the in-station LNG storage tank produced gets into in the gas tube side of double helix coil pipe among the cold-storage heat exchanger through first valve and gas pump, get into the gas pipeline through the second valve after the heat transfer, the oil gas that the oil tank produced gets into in the oil gas tube side of double helix coil pipe among the cold-storage heat exchanger through third valve and oil gas pump, after the heat transfer, liquefied oil returns back in the oil tank again through the fourth valve, utilize BOG's cold energy condensation recovery oil gas, the oil gas after the condensation becomes liquid again and gets back to in the storage tank, BOG then gets into the gas pipe network after further rising temperature, and simultaneously, solve BOG release cold volume and the thermal matching problem of oil gas condensation release, adopt the diglycol aqueous solution to carry out the cold-storage.
Description
Technical Field
The invention relates to the technical field of gas engineering, in particular to a combined BOG and oil gas recovery system and a process method.
Background
At present, the main BOG recovery modes are as follows: (1) re-liquefying the LNG by using an external cold source; (2) heating and gasifying completely, and then introducing pipeline gas; (3) pressurized into CNG for delivery to the vehicle. The main modes of oil gas recovery are as follows: a condensation method; adsorption method; the absorption method, wherein a heat source is needed to set for BOG heating, a cold source is needed to set for oil gas condensation recovery, two systems operate independently, and certain waste exists in energy.
Disclosure of Invention
The invention mainly solves the technical problem of providing a combined BOG and oil gas recovery system and a process method, namely, the oil gas is recovered by condensing the cold energy of the BOG, the condensed oil gas is changed into liquid state again and returns to a storage tank, and the BOG is further heated and enters a gas pipe network. Meanwhile, the matching problem of BOG released cold and oil gas condensed released heat is solved, and the diethylene glycol aqueous solution (without limitation) is adopted for cold accumulation, so that the problem in the background technology can be solved.
In order to solve the technical problems, the invention adopts a technical scheme that: the BOG and oil gas combined recovery system and the process method comprise the following steps: the system comprises a fuel gas pump 1, a first valve 2, a second valve 3, a third valve 4, a fourth valve 5, an oil gas pump 6 and a cold storage heat exchanger 7; the BOG pipe connection that first valve 2 and LNG storage tank produced, the entry of gas pump 1 is connected with first valve 2, the export of gas pump 1 is connected with cold-storage heat exchanger 7, cold-storage heat exchanger 7 is connected with fourth valve 5, fourth valve 5 is connected with oil export pipeline, third valve 4 is connected with oil gas inlet pipeline, third valve 4 is connected with 6 entrys of oil gas pump, 6 exports of oil gas pump are connected with cold-storage heat exchanger 7, cold-storage heat exchanger 7 is connected with second valve 3, second valve 3 is connected with gas export pipeline.
Preferably, the cold storage heat exchanger 7 is filled with a diethylene glycol aqueous solution 8, and a double-spiral coil 9 is arranged inside the cold storage heat exchanger.
Preferably, the BOG and oil gas combined recovery system and the process method comprise the following steps:
the method comprises the following steps: BOG generated by the LNG storage tank in the station enters the cold accumulation type heat exchanger through the first valve and the gas pump, and enters the gas outlet pipeline through the second valve after heat exchange.
Step two: oil gas generated by the oil tank enters the cold accumulation type heat exchanger through the third valve and the oil gas pump, and returns to the oil tank through the fourth valve after heat exchange.
The invention has the beneficial effects that: 1. BOG cold energy is utilized to condense and recover oil gas, so that the combined recovery of the BOG and the oil gas is realized, the reasonable configuration of cold and heat in the station is realized, and the ineffective dissipation loss is avoided;
2. the cold storage type heat exchanger is internally filled with a diglycol aqueous solution (not limited to the solution) as a cold storage solution, when the cold quantity released by the BOG side is more than the heat quantity released by the oil product side, the redundant cold energy can be stored, and the cold storage type heat exchanger has a cold storage effect;
3. the freezing point set value of the diethylene glycol aqueous solution (not limited to the solution) is higher than the freezing point of the oil product, while the temperature of the BOG is far lower than the freezing point of the oil product, and the problem that the pipeline is blocked by the side solidification of the oil product is avoided by utilizing the principle that the temperature is not changed in the solidification process of the solution;
4. The double-spiral coil pipe, namely the gas pipe and the oil gas pipe are coiled in a double-spiral mode in parallel, the two medium pipelines are separately arranged and are parallel to each other but not in contact with each other, and the shell side is filled with the diglycol aqueous solution (not limited to the solution).
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
Referring to fig. 1, an embodiment of the present invention includes:
a BOG and hydrocarbon combined recovery system, comprising: the system comprises a fuel gas pump 1, a first valve 2, a second valve 3, a third valve 4, a fourth valve 5, an oil gas pump 6, a cold storage type heat exchanger 7 filled with a diglycol aqueous solution 8, and a double-spiral coil 9 inside the cold storage type heat exchanger; the BOG pipe connection that first valve 2 and LNG storage tank produced, the entry of gas pump 1 is connected with first valve 2, the export of gas pump 1 is connected with cold-storage heat exchanger 7, cold-storage heat exchanger 7 is connected with fourth valve 5, fourth valve 5 is connected with oil export pipeline, third valve 4 is connected with oil gas inlet pipeline, third valve 4 is connected with 6 entrys of oil gas pump, 6 exports of oil gas pump are connected with cold-storage heat exchanger 7, cold-storage heat exchanger 7 is connected with second valve 3, second valve 3 is connected with gas export pipeline.
BOG generated by an LNG storage tank in the station enters a gas pipe pass of a double-spiral coil 9 in a cold storage type heat exchanger 7 through a first valve 2 and a gas pump 1, and enters a gas outlet pipeline through a second valve after heat exchange; oil gas that the oil tank produced gets into the oil gas tube side of double helix coil 9 in the cold-storage heat exchanger 7 through third valve and oil gas pump 6 through oil gas inlet pipe way in, after the heat transfer, liquefied oil returns the oil tank through fourth valve 5 again, cold-storage solution in the cold-storage heat exchanger 7 is diethylene glycol aqueous solution, but not limited to this solution, the unnecessary cold energy that BOG provided is stored with the form of phase transition by cold-storage solution, and its freezing point is higher than the freezing point of oil, cold-storage solution solidification in-process temperature is unchangeable, consequently, oil side temperature can not be less than the freezing point of oil, the oil pipeline can not produce to freeze stifled.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (3)
1. A BOG and oil gas combined recovery system and a process method are characterized by comprising the following steps: the system comprises a fuel gas pump (1), a first valve (2), a second valve (3), a third valve (4), a fourth valve (5), an oil gas pump (6) and a cold storage type heat exchanger (7); the BOG pipe connection that first valve (2) and LNG storage tank produced, the entry of gas pump (1) is connected with first valve (2), the export of gas pump (1) is connected with cold-storage heat exchanger (7), cold-storage heat exchanger (7) are connected with fourth valve (5), fourth valve (5) are connected with oil export pipeline, third valve (4) are connected with oil gas inlet pipeline, third valve (4) are connected with oil gas pump (6) entry, oil gas pump (6) export is connected with cold-storage heat exchanger (7), cold-storage heat exchanger (7) are connected with second valve (3), second valve (3) are connected with gas outlet pipeline.
2. The BOG and oil gas combined recovery system and process method of claim 1, wherein the BOG and oil gas combined recovery system comprises: diethylene glycol aqueous solution (8) is filled in the cold storage type heat exchanger (7), and a double-spiral coil (9) is arranged in the cold storage type heat exchanger.
3. The BOG and oil gas combined recovery system and process method of claim 1, wherein the BOG and oil gas combined recovery system comprises the following steps:
the method comprises the following steps: BOG generated by an LNG storage tank in the station enters a cold accumulation type heat exchanger through a first valve and a gas pump, and enters a gas outlet pipeline through a second valve after heat exchange;
step two: oil gas generated by the oil tank enters the cold accumulation type heat exchanger through the third valve and the oil gas pump, and returns to the oil tank through the fourth valve after heat exchange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694473.1A CN111849580A (en) | 2020-07-17 | 2020-07-17 | BOG and oil gas combined recovery system and process method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694473.1A CN111849580A (en) | 2020-07-17 | 2020-07-17 | BOG and oil gas combined recovery system and process method |
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| CN111849580A true CN111849580A (en) | 2020-10-30 |
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| CN202010694473.1A Pending CN111849580A (en) | 2020-07-17 | 2020-07-17 | BOG and oil gas combined recovery system and process method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100304A (en) * | 2021-11-26 | 2022-03-01 | 青岛双瑞海洋环境工程股份有限公司 | VOC (volatile organic compounds) treatment system of crude oil transport ship and LNG (liquefied natural gas) power ship |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402644A (en) * | 2016-09-06 | 2017-02-15 | 常州大学 | BOG and oil gas combined recycling system of LNG oil gas cooperative station |
| CN109416002A (en) * | 2016-07-05 | 2019-03-01 | 川崎重工业株式会社 | Ship |
-
2020
- 2020-07-17 CN CN202010694473.1A patent/CN111849580A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109416002A (en) * | 2016-07-05 | 2019-03-01 | 川崎重工业株式会社 | Ship |
| CN106402644A (en) * | 2016-09-06 | 2017-02-15 | 常州大学 | BOG and oil gas combined recycling system of LNG oil gas cooperative station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100304A (en) * | 2021-11-26 | 2022-03-01 | 青岛双瑞海洋环境工程股份有限公司 | VOC (volatile organic compounds) treatment system of crude oil transport ship and LNG (liquefied natural gas) power ship |
| CN114100304B (en) * | 2021-11-26 | 2024-06-04 | 青岛双瑞海洋环境工程股份有限公司 | Crude oil transport ship VOC processing system and LNG power ship |
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Application publication date: 20201030 |
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